As the 2X comes without active cooling for PLA prints (a great project which works on a retrofit can be found here: http://www.thingiverse.com/thing:90174 ) I designed this simple frame to allow the installation of up to 3x 90mm PC fans for active cooling. Simply remove the hood, open the door and slide the frame on. I used the following settings: Infill 10% Layer Height 0.27mm Number of shells 1 Feedrate 80 mm/s Travel Feedrate 120 mm/s I have included 2 versions of the frame. One with ear rafts (in case you have issues with the edge of the large plate lifting) and one without. Also the uploaded version 3 should take care of the center gap you see in the picture of the first test of the thing.